27897849 has 12 divisors (see below), whose sum is σ = 46053696. Its totient is φ = 15941592.

The previous prime is 27897839. The next prime is 27897887. The reversal of 27897849 is 94879872.

It is not a de Polignac number, because 27897849 - 2¹¹ = 27895801 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27897795 and 27897804.

It is not an unprimeable number, because it can be changed into a prime (27897839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221349 + ... + 221474.

It is an arithmetic number, because the mean of its divisors is an integer number (3837808).

Almost surely, 2^27897849 is an apocalyptic number.

It is an amenable number.

27897849 is a deficient number, since it is larger than the sum of its proper divisors (18155847).

27897849 is a wasteful number, since it uses less digits than its factorization.

27897849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442836 (or 442833 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 27897849 is about 5281.8414402555. The cubic root of 27897849 is about 303.2891726827.

The spelling of 27897849 in words is "twenty-seven million, eight hundred ninety-seven thousand, eight hundred forty-nine".